Rotary harrow.



J. T. CUNNINGHAM.

ROTARY HARBOW.

APPLICATION FILED .TUNE 17, 1910.

W'TNESSES.-

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Patented Nov. 22, 1910.

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A TTORNE ya',

UNITED STATES PATENT OFFICE.

JOSEPH T. CUNNINGHAM, OF CINCINNATI, OHIO.

ROTARY HARROW.

Application iiled .Tune 17, 1510.

To all 'ar/tom, 'it muy concern:

Be it linown that I, Josurii T. CUNNING- HAM, a citize'n of the United States, residingl at Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Rotary Narrows, of which the following is a specification.

My invention relates to agricultural iinplements and the. object is to provide a rotary harroiv of improved construction and of increased eilicciicy in operation.

My invention consists in the combination in a rota-ry hurrow of teeth of peculiar formation and oit means for securing said teeth on said harrou1 permitting them to he conveniently removed therefrom Iand replaced thereon, as well as in the details of construc- 4tion and arrangement as will hereinafter be more fully described and claimed.

In the drawing: Figure 1 is a sectional plan view of a device embodying my invention. Fig. 2 is a partial cross section of one of the rollers on a line corresponding with the line. in Fig. 1. Fig. 3 is a side elevation of the tooth and Fig. Il is a plan view of same.

The essential feature of my in'iprovemeut is the provision oi teeth with cutting edges that will engage with and break up the elods as they successi\'elj,' come down to the ground when carried around on the roller and which will with equal ciiicieney barrow or break up the ground as the teeth enter the ground when the roller is rolled over the ground.

The tooth 1 which I provide for operating in the above-described manner comprises a straight cylindrical portion .1 anime-ent to a head l, and a lonffer tapernior or coni.` cal portion l occupied by radially extending longitudinal blades or "fins 1". These blades or iins 1 have their outwardly extending edges sharp and these edges extend substantially parallel with the axis of 'the tooth from thc junction of the conical part 11" with the cylindrical part 1 to about ialf the len'Tth of the conical portion and then these ec ges gradually curve inward toward the conical portion of the tooth and meettherewith and terminate said blades or fins a sullicient distance short of the end or apex of the conical portion l to allow the region 1l of the conical portion 1 adjacent to the apex thereof to constitute a point that operates to disintegrate the particles of earth Specification of Letters Patent.

Patented Nov. 22, 1910. Serial No. 567,423.

under the surface after the blades or tins 1 have performed their cutting operation on the particles on thc surface.

At no place do the blades or fins 1 extend past the limits el. the cylindrical portion 1/. The teeth l thus formed are adapted for convenient application to and removal from the cylinder or roller 2 by mounting said teeth in sta-ves 2', the teeth being placed through openings 2. `in the staves and the heads 1l of the teeth being received by -inortises 2 in the staves so that the outer surfaces of the heads lie flush with the ininer surfaces of the staves, The straight cylindrical portion l of each tooth is substantially of the length to bring the junction of the conical portion therewith even with the surface of the stave where the tooth extends through, and it is to thus form u firm bearing in the opening 52 in the stave that this straight cylindrical portion 1 is provided, the entire opcratinglength of the tooth being constituted by the conica-l por- -tion 1 with its blades or tins 1 and its pointed end part 1b. V

The stares 2 with the teeth l mounted therein are placed on the cylinder 2 with the surfaces of the heads thereaoainst, and these. stares being made to lit Wit i suiiicient accuracy and covering the entire convex snrfacc of the cylinder 2, clanlping bands B are placed around the stares near their ends and-4i the end parts 8 of the clainpiiig bands, which are bent upward for this.purpose, are drawn together by a bolt/3". yThis rigidly secures the. entire series of stoves with all of the teeth therein to the cylinder 2.f The cylinder 2 is made up of a series of sta-ves or beams 2 rirridl and )ermanentl secured to ends 2", preferably by means of lagv screws 2, as illustrated. Each oi the ends 2b is made up preferably of three thicknesses 2" permanently secured together, and, thus arranged can be coustructed of wood, thel different thicknesses being placed together with the grain of the wood ruiming in dil'erent directions7 thus reinforcing each other and providing a structure oft sulicient strength to withstand the strains imposed in operation. The ends 2b thus made up are of suiiicient thickness to aii'ord a hearing 2 by means of which the cylinder 2 may rotate on a sha-ft 2d which is mounted in stationary position on a frame 4 which is provided with a pole 11 and a doubletree 4J and swingletrees 4" by means of which the machine may be drawn.

over the ground.

As indicated invFig. 1 two cylinders'or rollers-'2 are provided -Wth complete sets of teeth'- and stares, in which the .teeth are mounted, and clamping bands to hold the vstaves on the cylinders. Thus arran ed, the

and side beams 4,

frame 4 isA constructed with a mid le -or- Wardly 4and rearwardly extending beam '4" rollers 1are rigidly secured-to' these beams et" and-1"', as shown, andas I prefer to arrange the rollers, :one of thel'nis mounted with its axialline forward of that ofthe other. This arrangement adds stabilityto the inachine and reduces the-strain on the parts, asWell as affords agreater degree of snp '1 port tothe .pole Il?, reducing theburden on the animals-'which draw '-themachine.

edges tp'resented 'will' perform operationn'pon desentl'in'g'on as .the jroll'er proceeds Without 'particular ait- 'tention tof-their position as placedA on Y vWithout interference -knfe edges'ipr'esent thus presenting radial p jojecting'blades or fin inachine, las .is. thle tcase 'with operate 'upon 'descend "fist @inserted-f' 'congenience 1 lie'l1ead lfof the@ tooth vstrilet-l'ire .isz thns aordedwith all the :strength-.of a perraanent'strncture the remerely loosening the"elampingbandsiand froriithe cylinder 2" andi withdrawing and;

replacing sach. teleth as may be required to "be, replaced through breakage or forother Y I :.reasons.

Likewise any number of teeth.

niaybe used in the inajchne as desired. As'

shown,.the teeth "of each row are arranged inalinement with the spaes'bctween teeth 7 in 'the adjacent rows, as' is best adapted to 4avoid clogging` ofthe machine in use.

VHavingl fully describedl my invention Thev shaft-s2" of both extending' to and 'constituting an apex formth the' great-I whatl claim as new and desire to secure by Letters Patent is:

1.- In arotary harrow, a cylinder armed with teeth, each-tooth com rising a straight cylindrical portion with a road head adjacent thereto forming one end of the tooth and a tapering or conical portion forming a junction with said cylindrical portion and 'extending to and constitntin an a, ex forining th'e'other end of the toot 1, an( .radially Y extending blades or fins lying longitudinally of said conical portion reaching from the nncti on of said conical portion with saidcyindrical portion and terininatin short of the 'apex of the conical portion, rif iereby the part of the conica-l portion adjacent to the apex vforms a point, substantially as and for the purposes set forth.

`'2. In a rotary barrow, a cylinder armed with teeth, each tooth com rising a strai ht cylindrical portion with a road head a Jaoent thereto forming one end of the tooth and a tapering or conical portionforining a junction with said cylindrical portion and ingltlie other end of the tooth, and radially extending bladesI or ii'nslying longitudinally f 's'ii'd conical portion reaching from the on of' sai'd-conical 'portion with said ndrical portion :anditerminating short of bei; of the conical' portion,.whereby the of the conical portionfadjacent tothe iiig'.edges ontwardlylpresented and approaching'.thej. conical portio'nas they. extend to` \ia'rd..the apex thereof, andsaded es'bein nlinedlwithin the limits of-said'cy indrica snbstantiallly'A as and for 'the pur- ,os'esise .forth v:

EqnIn'a rotary harroiv\ the combination Qnth'a cylinder, of .a scifies of staves and ineans for removably securing. said-staves .on' the convent surface-ofthe cylinder, and a series of't-'eetli removably securedin said which vthe .teeth are inserted' to extefndfrtf.f dially outward on the cylinder, heads-on the` teeth to rest against the convex surface of theoylinder, said `staves .having mortises to receivethe heads," said teeth comprisin conical port-ions and fins or blades'on sai conicalportions, said fins o r blades being'adapted. to pass through the openin s in said .staves when the teeth are inserte therein. In testi mon f Whereofl atlix i'ny signature in presence o two Witnesses.

JOSEPH T. CUNNINGHAM. VVitnessesz Cms. VY, Kana, CLARENCE Pannen'.

ap x forms n. point, said blades or tins havstares, the staves havingA openings-through 1:95 

